Also note that the thread was started in 2005, but people continued to post to it over the years and there are some good 2010 comments at the end.

I rely on www.chowhound.com for sugestions. It takes awhile to read all the posts (use Search) but they are very reliable and will know about unusual places. If you post to ask for a suggestion, be sure to say how many in your party, price range, casual or Fine Dining, anything to narrow it down. Here's a good post a local made:
http://chowhound.chow.com/topics/95252?tag=search_results;results_list

If no one has a good suggestion for you, try yelp: http://www.yelp.com/c/las-cruces-nm/restaurants